DFR11EQ Digital Signal Processor
Specification Sheet
DFR11EQ DIGITAL SIGNAL PROCESSOR
A full–featured signal processor designed for sound reinforcement applications, including theaters, conference
rooms, meeting halls and houses of worship. The DFR11EQ
offers a straightforward computer control interface that
makes sense without a software manual or training course.
The system also features tamper–proof front panel lockouts
and the exclusive ShureLink network, which controls up to 16
units from one computer connection.
The DFR11EQ is a true problem-solver with features including 10 automatic, adaptive, feedback filters, equalizer
limiter and delay for challenging acoustical situations.
HARDWARE FEATURES
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Crystal* 20-bit A/D and D/A converters (Analog-to-Digital, Digital-to-Analog) allows 104 dB of dynamic range.
48 kHz sampling rate provides flat response to 20 kHz.
Onboard Scenes can be selected via front panel buttons.
1/ rack space chassis allows rack mounting of one or two
2
units in a single rack space with no sagging or bending.
Shure Link Interface allows multiple Shure Link devices
to be controlled with a single computer.
There are no internal batteries. Settings and DSP program are stored in internal EEPROM.
Electronically balanced input features combination 1/4-in.
and XLR connector and can be used with
balanced or
unbalanced outputs.
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Independently driven, cross-coupled, balanced 1/4-in.
and XLR outputs can be used with balanced or unbalanced inputs, without signal loss.
Input and output levels are +4 dBu/–10 dBV DIP-switchselectable.
88 MHz Motorola* DSP56009 processor engine features
full 24-bit internal processing.
RS-232 interface allows external computer control and
firmware updates.
Internal linear power supply is switchable between 120
and 230 Vac, eliminating the need for a cumbersome external power supply.
Solid state bypass eliminates unreliable mechanical relays.
SOFTWARE FEATURES
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Adaptive Notch Filter algorithm (patent pending) automatically detects feedback and deploys up to 10 narrow
band notch filters.
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A tamper-proof equalizer can be switched between
30-band graphic or 10-band parametric equalizer.
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The graphic equalizer is a constant-Q, 30-band, 1/3-octave
graphic equalizer. It can boost up to 6 dB or cut 12 dB for
each band.
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The parametric equalizer offers 10 filters with adjustable
E2002, Shure Incorporated
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frequency, up to 6 dB of boost or 18 dB of cut, and up to
a two octave bandwidth.
Up to 1.3 seconds of Digital Delay.
Front and back panels both feature lockout control.
The Response Curve Viewer displays frequency response of the feedback reducer, equalizer, or both.
10 scenes can be stored on board. Multiple scenes can
be stored to floppy or hard disk.
The Limiter provides added protection to external speakers and amplifiers.
DFR11EQ DIGITAL SIGNAL PROCESSOR
Specification Sheet
SPECIFICATIONS
Frequency Response
FUSE
20 to 20k Hz ± 1.0 dB re 1 kHz
Dynamic Range
104 dB minimum, A-weighted, 20 Hz to 20 kHz
Dimensions
Sampling Rate
219 mm x 137 mm x 44.5 mm
8 5/8 in x 5 3/8 in x 1 3/4 in
48 kHz
Digital-to-Analog, Analog-to-Digital Conversion
Weight
20 bit resolution
930 g (2.05 lbs)
FEEDBACK FILTERS
Ten (10) 1/10-octave adaptive notch filters from 60 Hz
to 20 kHz
Deployed to 1 Hz resolution of feedback frequency
Deployed in depths of 3 dB, 6 dB, 9 dB, 12 dB, and 18
dB (12.5 Low Q in graphic EQ mode) attenuation
Filter shape variable between HI Q and LOW Q (see
High Q vs. Low Q Filters).
GRAPHIC EQUALIZER
Voltage Gain
–1 dB ± 1dB (power off)
0 dB ± 2 dB (equal input and output sensitivities)
12 dB ± 2 dB (input –10 dBV, output +4 dBu)
–12 dB ± 2 dB (input +4 dBu, output –10 dBv)
Impedance
Input: 47 kΩ ± 20% actual
Output: 120 Ω ± 20% actual
Input Clipping Level
+18 dBu minimum (at +4 dBu setting)
+4 dBV minimum (at –10 dBV setting)
Frequency Bands
Output Clipping Level
30 bands on ISO, 1/3-octave centers
+18 dBu minimum (at +4 dBu setting)
+4 dBV minimum (at –10 dBV setting)
Filter Type
1/ -octave,
3
Total Harmonic Distortion
constant Q
Maximum Boost
< 0.05% at 1 kHz, +4 dBu, 20 to 20 kHz
6 dB per band
LED Signal Indicators
Maximum Cut
Clip: 6 dB down from input clipping
12dB per band, high- and low-pass filters, 12dB/octave
nominal
PARAMETRIC EQUALIZER
Propagation Delay from Input to Ouput
1.0 ms, all filters set to Flat (0 ms delay setting)
Polarity
Frequency Bands
Input to output: non-inverting
XLR: pin 2 positive with respect to pin 3
1/ -in. TRS: tip positive with respect to ring
4
10 bands, variable frequency, variable Q
Boost/Cut Range
+6 dB to –18 dB per band
Operating Voltage
Q Range
DFR11EQ: 120 Vac, 50/60 Hz, 75 mA max
DFR11EQJ: 100 Vac, 50/60 Hz, 75 mA max
DFR11EQE: 230 - 240 Vac, 50/60 Hz, 38 mA max
1/ -octave
40
to 2 octave
Shelf/Rolloff Filters
Temperature Range
Operating: –7_ to 49_ C (20_ to 140_ F)
Fuse
DFR11EQ:120 Vac. Fuse: 100 mA, 250V time delay
DFR11EQJ: 100 Vac. Fuse: 100 mA, 250V time delay
DFR11EQE: 230 Vac. Fuse: 50 mA, 250 V time delay
In order to change a blown fuse, remove the power cord
and pry open the drawer with a flathead screwdriver.
to 1
Ratio:
∞
2
Shelf, +6 to –18 dB per filter
Rolloff, 6dB, 12dB, 18dB, or 24dB per octave nominal
DELAY
Up to 1.3 seconds
LIMITER
Threshold: –60 dBFs to –0.5 dBFs, 0.5 dB resolution
Attack: 1 ms to 200 ms
Decay: 50 ms to 1000 ms
DFR11EQ DIGITAL SIGNAL PROCESSOR
DFR11EQ AUDIO INPUT
Specification Sheet
DFR11EQ AUDIO OUTPUT
Connector:
(XLR and
1/4-inch
separate)
XLR (male)
1/4-inch
phone plug
(female)
Configuration:
active balanced
cross coupled
active balanced
cross coupled
47 kΩ
Actual
Impedance:
120 Ω
120 Ω
+4 dBu
(+4 input level)
+4 dBu
(+4 input level)
Nominal
Output Level:
+4 dBu
(+4 output level)
+4 dBu
(+4 output level)
–10 dBV
(–10 input level)
–10 dBV
(–10 input level)
–10 dBV
(–10 output level)
–10 dBV
(–10 output level)
+18 dBu
(+4 input level)
+18 dBu
(+4 input level)
+18 dBu
(+4 output level)
+18 dBu
(+4 output level)
+6 dBV
(–10 input level)
+6 dBV
(–10 input level)
+6 dBV
(–10 output level)
+6 dBV
(–10 output level)
Pin
Assignments:
Pin 1 = ground
Pin 2 = hot
Pin 3 = cold
Tip = hot
ring = cold
sleeve = ground
Pin
Assignments:
Pin 1 = ground
Pin 2 = hot
Pin 3 = cold
Tip = hot
ring = cold
sleeve = ground
Voltage /
Current/
Phantom Power
Protection?
yes
yes
Voltage /
Current/
Phantom Power
Protection?
yes
yes
Connector:
(XLR and
1/4-inch
combined)
XLR (female)
1/4-inch
phone plug
(female)
Configuration:
active balanced
active balanced
Actual
Impedance:
47 kΩ
Nominal
Input Level:
Maximum
Input Level:
Maximum
Output Level:
CERTIFICATIONS
DFR11EQ (Version 5)
Eligible to bear CE marking. Conforms to European
UL Listed and cUL Listed to UL 6500 and CSA E65. ApUnion Low Voltage Directive 73/23/EEC; VDE GS–Certiproved under the verification provision of FCC part 15 as
fied to EN 60065. Conforms European Union EMC Direca Class B Digital Device.
tive 89/336/EEC; Emissions per EN 50081–1 (1992) and
DFR11EQE (Version 5)
Immunity per EN 50082–1 (1992).
NOTE:
*EMC conformance testing is based on the use of supplied and recommended cable types. The use of other cable types
may degrade EMC performance.
*Under extremely abnormal conditions of electrical fast transients on the power line, communication may be interrupted
between the DFR11EQ and the controlling PC. The unit will not be damaged; normal operation will resume after the CONNECT button or command is used to restore the connection
FURNISHED ACCESSORIES
Power Cable (DFR11EQ5/DFR11EQJ)*
95A8389
Power Cable (DFR11EQ5E)*
95A8247
Power Cable Clamp*
95A8712
5-pin DIN Shure Link Cable
95A8676
Single Mount Rack Bracket
53A8450
Dual Mount Rack Bracket
53B8442
Straddle Bars
53B8443
DFR11EQ Version 5 Software/User’s Guide
CD–ROM
95A8830A
3
*NOTE: The power cord and power cable clamp is supplied
assembled. If a replacement power cord is needed, a power
cord clamp is also required. If not assembled, the power cord
clamp should be clamped as close to the female end of the
power cord as possible.